How to Build a Cedar Raised Garden Bed

Gardening begins with the soil, and a raised bed provides the absolute best control over that growing medium. By lifting your plants above the native ground, you bypass compacted soil, improve drainage, and create a manageable workspace that saves your back while keeping weeds at bay. Building this right means choosing materials that withstand constant moisture without leaching chemicals into your harvest. We use cedar for its natural decay resistance, ensuring your structure stands solid for years rather than rotting after a single season. Done well, your bed will look clean, hold its shape against the weight of heavy soil, and become the most productive square footage in your yard.

1. Cut Cedar to Exact Dimensions. Cut your cedar boards to your desired length—standard sizes are 4x8 feet or 4x4 feet. Ensure your cuts are perfectly square so the corners meet flush.
2. Anchor Your Frame's Four Corners. Cut four 4x4 posts to the same height as your bed's walls. These posts provide the structural anchor for your long boards.
3. Lock Down All Four Sides. Align your first side board against a corner post and secure it using three deck screws. Repeat this for all four sides to form a rectangle.
4. Dial In Perfect Corners. Measure diagonally from corner to corner. If the two measurements are identical, your frame is perfectly square.
5. Countersink Every Screw Flush. Verify all screws are driven flush or slightly countersunk into the cedar. Ensure no sharp ends are poking through the wood.
6. Set Level and Anchor Deep. Place the frame in your chosen location and use a long level to ensure the top edges are even. If the ground is uneven, dig a shallow trench under the high side.